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iShares MBS ETF MBB

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Price alert · MBB

All alert types
91.95 USD -0.15 (-0.16%)

Nov 6, 2026, 10:07 AM EST

91.88 Day range 92.03
88.58 52-week range 96.97
YTD
-3.43%
1 year
-3.53%

iShares MBS ETF

Issuer
IShares
Asset class
Fixed Income
Expense ratio
0.04%
Assets under management
$35.89B
NAV
91.97
Holdings
10,825
Inception
2007-03-13
Top 10 weight
11.16%

Top holdings

  1. BLACKROCK CASH CL INST SL AGENCY 5.43%
  2. FHLMC 30YR UMBS SUPER 2.00% 05/01/2051 1.05%
  3. UMBS 30YR TBA(REG A) 5.50% 11/12/2026 0.76%
  4. GNMA2 30YR TBA 6.00% 11/19/2026 0.70%
  5. GNMA2 30YR 5.00% 11/20/2054 0.59%
  6. GNMA2 30YR 2.00% 10/20/2051 0.54%
  7. GNMA2 30YR 2.00% 12/20/2051 0.53%
  8. FNMA 30YR UMBS 2.00% 12/01/2051 0.53%
  9. GNMA2 30YR 2.50% 07/20/2051 0.52%
  10. FHLMC 30YR UMBS SUPER 2.00% 04/01/2051 0.51%
  11. GNMA2 30YR TBA(REG C) 5.50% 11/19/2026 0.49%
  12. FNMA 30YR UMBS 2.00% 11/01/2051 0.45%
  13. GNMA2 30YR 5.00% 04/20/2056 0.43%
  14. GNMA2 30YR 5.50% 09/20/2053 0.40%
  15. GNMA2 30YR 5.50% 09/20/2055 0.40%
  16. UMBS 30YR TBA(REG A) 5.00% 11/12/2026 0.37%
  17. GNMA2 30YR 2.50% 05/20/2051 0.35%
  18. GNMA2 30YR TBA(REG C) 4.50% 11/19/2026 0.34%
  19. FNMA 30YR UMBS SUPER 2.00% 04/01/2052 0.33%
  20. GNMA2 30YR 2.00% 01/20/2052 0.33%
  21. GNMA2 30YR 5.00% 05/20/2056 0.32%
  22. UMBS 15YR TBA(REG B) 4.00% 11/17/2026 0.32%
  23. FNMA 30YR UMBS 2.00% 10/01/2051 0.32%
  24. GNMA2 30YR TBA(REG C) 5.00% 11/19/2026 0.30%
  25. GNMA2 30YR 2.50% 08/20/2051 0.30%

Sector weights

  • Federal National Mortgage Association 42.64%
  • Federal Home Loan Mortgage Corporation 30.24%
  • Government National Mortgage Association 24.01%
  • Uniform MBS 2.67%
  • Cash and/or Derivatives 0.44%

Country weights

  • United States 94.69%
  • Other 5.32%

Updated 2026-11-05

Held by funds

19 US ETFs and mutual funds hold MBB · largest positions

Funds holding MBB, by value held
FundValue heldWeight in fund
APCB $119.89M11.98%
FTRB $96.28M13.04%
BDBT $74.42M14.92%
BAMPX $46.40M5.94%
BACPX $44.00M9.93%
WTBN $26.90M25.62%
MAMB $25.09M12.47%
BNDC $23.08M10.46%
DUKZ $8.95M15.04%
FLTN $4.81M27.80%
DYFI $3.99M7.00%
AGGP $2.45M9.27%
FOPC $2.22M6.99%
ADFI $1.98M14.77%
LCR $828.37K1.26%
MEM $264.26K0.50%
MEMS $205.91K1.00%
KDRN $171.34K15.16%
QMN $110.66K1.78%